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三星风扇问题

tag-icon • tag-icon 14.04 drivers fan
三星风扇问题

我在三星 aviv book 8 (NP870Z5G) 上安装了 Ubuntu 14.04 LTS。我遇到了风扇问题，风扇在 Ubuntu 下比在 Windows 下运行得更频繁。
例如，我一直很喜欢这台电脑，因为它在进行桌面工作时没有任何风扇旋转，但在 Ubuntu 下，风扇时不时会旋转。

我发现这个帖子风扇一直开着，CPU 使用率很低，找不到风扇或 thermal_zone proc 文件并尝试遵循所给出的建议。

通过运行fwtsfan 命令我得到了以下输出：

Test 2 of 2: Load system, check CPU fan status.
Test how many fans there are in the system. Check for the current status of the
fan(s).
Loading CPUs for 20 seconds to try and get fan speeds to change.
Fan cooling_device2 current state did not change from value 0 while CPUs were
busy.
Fan cooling_device3 current state did not change from value 0 while CPUs were
busy.
Fan cooling_device4 current state did not change from value 0 while CPUs were
busy.
Fan cooling_device5 current state did not change from value 0 while CPUs were
busy.
Fan cooling_device6 current state did not change from value 0 while CPUs were
busy.
Fan cooling_device7 current state did not change from value 0 while CPUs were
busy.
Fan cooling_device8 current state did not change from value 0 while CPUs were
busy.
Fan cooling_device9 current state did not change from value 0 while CPUs were
busy.

ADVICE: Did not detect any change in the CPU related thermal cooling device
states. It could be that the devices are returning static information back to
the driver and/or the fan speed is automatically being controlled by firmware
using System Management Mode in which case the kernel interfaces being examined
may not work anyway.

然后我运行lsmod | grep samsung并得到了这个输出：

samsung_laptop         14673  0   
video                  20128  3 i915,samsung_laptop,nouveau

所以看起来我已经加载了三星的模块。

顺便说一下，的输出ls /proc/acpi/是：

button  
wakeup

答案1

首先，Ubuntu 不是 Windows。此外，风扇的速度由硬件传感器决定，该传感器可检测温度并防止过热。我在这个答案。因此，如果风扇在 Ubuntu 上运转得更快，那么这显然是必要的。你无法真正影响风扇的速度，你可能也不应该这样做。根据一些说法，这似乎与所谓的有缺陷的驱动程序有关，但这在很大程度上仍不清楚。

答案2

您使用的是新型开源视频驱动程序。它不能很好地管理电源。

另外，您可能有混合显卡，并且两个适配器同时工作。这会导致功耗大和过热。

您需要安装专有的 Nvidia 驱动程序并通过 nvidia-prime 或 bumblebee 设置适配器切换。

因此，这不是“风扇问题”，而是系统电源管理不佳。

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